公开(公告)号：US20200148860A1

公开(公告)日：2020-05-14

申请号：US16739360

申请日：2020-01-10

Applicant: BRIDGESTONE CORPORATION

Inventor： Yoshihiko KANATOMI ,  Shinichi MUSHA ,  Satoshi HAMATANI

IPC: C08L7/00 ,  B60C1/00 ,  B60C11/00

Abstract: Provided is a rubber composition capable of providing a vulcanized rubber excellent in fracture resistance, crack resistance, and low heat generation property. The rubber composition comprises a rubber component (A), a carbon black (B) having a CTAB specific surface area of 30-110 m2/g and a silica (C) having a CTAB specific surface area of 200 m2/g or larger. The total amount of the amount (b) of the carbon black (B) and the amount (c) of the silica (C) is 30-80 parts by mass relative to 100 parts by mass of the rubber component (A), and (b):(c)=(70-85):(30-15).

公开(公告)号：US20190177513A1

公开(公告)日：2019-06-13

申请号：US16322621

申请日：2017-08-03

Applicant: BRIDGESTONE CORPORATION ,  OTSUKA CHEMICAL CO., LTD.

Inventor： Satoshi HAMATANI ,  Aya SAIKI ,  Shinya SHINOZAKI ,  Mifuyu UENO ,  Masaki ABE

IPC: C08K13/02 ,  B60C1/00 ,  C08L7/00 ,  C08K3/04 ,  C08K3/36 ,  C08K5/25 ,  C08K5/32 ,  C07C243/38 ,  C07C243/36

Abstract: Provided is a rubber composition comprising: a rubber component containing diene-based rubber; a filler, and a compound represented by formula (I) below: (wherein: A is an aryl group and has at least two polar groups, which may be the same or different from each other; R1 and R2 are each independently at least one substituent selected from a group consisting of a hydrogen atom, an acyl group, an amide group, an alkyl group, a cycloalkyl group, and an aryl group; and further, the substituent may include one or more of O, S, and N atoms), so as to provide a rubber composition excellent in low heat generating property and wear resistance.

公开(公告)号：US20210108048A1

公开(公告)日：2021-04-15

申请号：US16464508

申请日：2017-11-29

Applicant: BRIDGESTONE CORPORATION ,  OTSUKA CHEMICAL CO., LTD.

Inventor： Satoshi HAMATANI ,  Shinya SHINOZAKI ,  Mifuyu UENO ,  Masaki ABE

IPC: C08K5/30 ,  C08K3/04 ,  C07C243/38 ,  B60C1/00 ,  B60C11/00

Abstract: An additive for rubber that enables a rubber composition to have excellent low heat generating property and processability, a rubber composition containing the additive for rubber, and a tire using the same are provided. A rubber composition comprises a hydrazone compound represented by the following Formula (I): where R1 and R2 each independently represent a hydrogen atom, an alkyl group with a carbon number of 1 to 16, or an alkenyl group with a carbon number of 2 to 6, and A represents a group represented by the following Formula (A-1) or Formula (A-2):

公开(公告)号：US20200148852A1

公开(公告)日：2020-05-14

申请号：US16739776

申请日：2020-01-10

Applicant: BRIDGESTONE CORPORATION

Inventor： Satoshi HAMATANI ,  Hidenobu AKAHANE

IPC: C08K3/04 ,  C08K3/36 ,  B60C1/00

Abstract: A rubber composition that is capable of providing vulcanized rubber excellent in the abrasion resistance without the deterioration of the crack resistance and the low heat generation property is provided. The rubber composition contains: (A) a rubber component; (B) carbon black having a CTAB specific surface area of 110 to 160 m2/g, a half value width ΔD50 of a peak including a Stokes equivalent diameter Dst obtained by a centrifugal sedimentation method of 60 nm or less, and ΔD50/Dst of 0.95 or less; and (C) silica having a CTAB specific surface area of 200 m2/g or more, has a total amount of a content (b) of the carbon black (B) and a content (c) of the silica (C) of 30 to 80 parts by mass per 100 parts by mass of the rubber component (A), and has (b)/(c) of (60 to 85)/(40 to 15).

公开(公告)号：US20170218165A1

公开(公告)日：2017-08-03

申请号：US15501284

申请日：2015-08-07

Applicant: BRIDGESTONE CORPORATION

Inventor： Satoshi HAMATANI

IPC: C08K3/04 ,  C09C1/48

CPC classification number: C08K3/04 ,  B60C1/00 ,  C01B32/00 ,  C01P2006/12 ,  C01P2006/19 ,  C01P2006/80 ,  C08K2201/003 ,  C08K2201/006 ,  C08K2201/011 ,  C08L7/00 ,  C08L21/00 ,  C09C1/48 ,  C08K3/36 ,  C08K5/09 ,  C08K5/18 ,  C08K3/22 ,  C08K5/47 ,  C08K3/06

Abstract: Provided is a rubber composition that, when adopted in a tire member such as a tread, displays low heat generation, high abrasion resistance, and high cut resistance, and enables excellent fatigue cracking resistance to be realized. The rubber composition contains carbon black that satisfies relationship formulae (1) to (3), shown below. 62.5×24M4DBP+hydrogen amount of carbon black≦8337.5   (1) 24M4DBP−0.25×CTAB≧62.5   (2) Dst+0.75×ΔD50≧152.5   (3)